Generate a process map visual diagram of the workflow

Often times upper management wants to see a visual, 1-page diagram of a workflow. We sometimes have an old PDF diagram that was created in Visio when the workflow was first conceived, but it usually no longer matches the actual workflow, because through testing sessions we made a lot of design improvements. But no one ever updates the diagrams. It would be very useful to have the workflow designer be able to export a visual diagram of the current state of the workflow, especially the parts of the task assignments and key decisions, swim lanes, etc.