We don't have a tutorial specifically fro the 3D Graph. The online help covers all of the methods and properties of the graph. Also, this example should provide you with a good demonstration of how to program with the 3D graph.
http://sine.ni.com/apps/we/niepd_web_display.DISPLAY_EPD4?p_guid=B45EACE3DA8F56A4E034080020E74861&p_node=DZ52139&p_submitted=N&p_rank=&p_answer=&p_source=External
Best Regards,
Chris Matthews
National Instruments