How can I go from graphviz input to something I can hand edit with a mouse?
Solution 1:
If you run graphviz in SVG output mode, you'll get an SVG file, which you can then edit easily (e.g., with Inkscape).
dot -Tsvg foo.dot > foo.svg
or neato, or whatever. -Tfig (xfig), -Tmif (FrameMaker) -Tps (PostScript), and -Tdia (dia, Linux/GTK diagraming tool) may also work, depending on what software you have available. A complete list of output formats is available.
Of course, the point of graphviz is that you don't have to lay it out by hand... have you looked at some of the graphviz options? They may alleviate whatever problem you're having.