Drawing graph left to right (horizontally) rather vertically (top to bottom)

Hi,
I did test on my project, and it seems grandalf will do the job. The only thing I was not able to find out in documentation is drawing
graph horizontally. Is this feature is implemented? Please let me know.
Actually I have tried rotating all the vertices 90 degree counter clock wise along to a pivot point but first you have to flip the graph horizontally, or else it won't do.

Cheers