Ok, I was going to post this in Nitey47's faction mod guide but since I have too many pics I didn't want to threadjack.
Anyhow, I have VS 2010 Ultimate, so I am not sure if this is part of the visualization tools (which effing rock, btw), or if this is part of the standard package. So this is how I did it step by step, warning: lots of pics, but I wanted to be complete.
OK, First I opened up the xml file in VS 2010. Then in the menu bar I went to XML---->Create Schema
This gives us the .xsd file. Right click on it and choose "View Designer"
Which brings us to this screen. Left click on the root element and drag it onto the design surface
This leaves us with a rather bland graph view. Click on the 2nd button (which gives you the tooltip "Show content model view" if you hover over it).
Now, click on the down arrows to open up the child nodes.
And finally, right click on the design surface and choose "Export diagram as image". Note that you can only export it as an .xps file. I printed it to .pdf and saved off the .pdf as a .png to upload. If you have a better way to get to a .png or .jpg then great.
Hopefully this was clear enough for anyone to follow. If your version of VS 2010 does not have these options, I can probably be persuaded to do this for any other xml files, just get me a list. I would prefer to be uploading them to a wiki type structure instead of various threads on here though, since things would be a bit more organized that way.
Hope this helps.