Yes, you can transfer a graph style from one system to another with two different methods. The first method involves using a graph itself as a "carrier" of the graph style, while the second method makes use of the Configurations options.
The first method is to apply the desired graph style to an appropriate graph. Next, save the graph and then open it on the other system. Click the background of the graph and then right-click on the Graphic Styles box on the Graph Tools toolbar. In the shortcut menu that is displayed, select the Save As command to display the Save As dialog. Specify the name for the new graph style and click the OK button. Now the graph style is part of the other system's graphics library. This is a quick and recommended means of porting a graph style.
The second method is to access the Configurations options pane of the Options dialog (accessible by selecting Options from the Tools menu). Click the Export button to display the Select Configurations dialog. Then, select the active configuration and click the OK button. Finally, use the Save As dialog to save the *.xml file to a location where the other system can retrieve it and later import it into their system.
To import the configuration, click the Import button in the Configurations options pane of the Options dialog to display the Open dialog. Next, select the *.xml file that you had previously saved and click the Open button to display the Select Configurations dialog. Here, select the configuration with the graph styles that you need to import, and click the OK button. After you have imported the *.xml file, in the Configurations options pane, select the configuration that you have just imported and click the Select button to load it. Once STATISTICA restarts, all of the graph styles from the other system will now be installed on the new system.
This latter method is the most efficient means of porting numerous graph styles; however, it may not be recommended because using the Configurations options will import all aspects of a system's settings (e.g., toolbar customization and output settings), not just its graph styles. If you only need to import graph styles, then the traditional method mentioned first is recommended.