[samatman]

Some algorithms do better at this than others, but "make a good diagram of a graph" is an intelligence-complete problem in the general case. Two people might render structurally-identical graphs in very different ways, to emphasize different aspects of the data. This is in fact a similar problem to the "generic graph algorithm" and "generic graph data structure" problems.

Graphs straddle the line between code and data. For instance, any given program has a call graph, so in a real sense, the "generic graph algorithm" is just computation.