Currently the RadOrgChart control does not have a built-in exporting functionality. For this reason, one possible approach that I can suggest you use is the PDF forge tool that will enable you export any web page. Here
is a link where you can find more information on it.
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed