NDepend has a nice feature that draws an internal dependency graph. That is which methods within a dll call each other.
We would like a diagram like this that showed how methods were called across all dll's in a project. Is this possible?
In the Dependency Matrix, you can select the cell that represents the dependency between the 2 assemblies (in the screenshot below punit-agent.dll and nunit-util.dll) and just left click it...
...and a method dependency graph is generated. Is it what you are asking for?
Notice in the first screenshot the parameter Weight on Cell that is set to # members. If you set to # types or # namespaces, you'll get a graph with types or namespaces.