If you have virtual Postscript printer installed in your computer, you can simply use the File → Print function in Microsoft Visio and save the VSD document to EPS format.
Convert Microsoft Visio diagram document to Encapsulated PostScript file.
We found one software available in the database for this conversion.
Multiplatform software - convert vsd to eps on any platform
A vector graphics editor
Convert from vsd file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.