This can be done with SystemModeler and Mathematica. The relevant function is a little bit hidden, but it's there. Here's an example:
WSMLink`Library`WSMDependencyGraph["Modelica.Mechanics.Rotational.Components.Spring"]
When hovering over the classes, the full name appears:
The object returned from the function includes a Graph, so you can operate on it with all the graph functionality in Mathematica. Also the function takes the same arguments as Graph, so you can get different graph layouts if needed.