For now, we do not have a way to go directly from DataGraph to TikZ. Thanks for pointing out this format though. We will have to give this some more thought.
FYI — We do output vector graphics in the form of an SVG file and you could try converting from SVG to TikZ: https://github.com/kjellmf/svg2tikz.
If you do we would be curious how well that works for you.
Also, if you are incorporating directly into a LaTex document, PDF or EPS usually works well.