Opalis VSD Generator is now avaiable, and it lets you export an Opalis policy as a Visio diagram, and optionally a Word document describing the activities and their properties/dependencies. This has been developed and tested for Visio 2010 and Word 2010. Word export is optional, so the tool can work if Visio is present, but not Word.
This provides more details about each object configuration, and this is certainly an area of the tool which could/will be enhanced in the future. This option is available if Word is installed on the machine running the tool, and if the corresponding option is checked):
Download: Opalis VSD Generator