Graphs help visualize information. It is also something which is being explored by artists by various other means of visualization to create artworks that work on the concepts of databases and narrative power of objects arranged in such manner.

Sounds are now also being used in such manner by artists to 'sonify' data and thus creating original and interesting results.

Links:

International Committee for Auditory Display
iSIC - Information Music
Sonification Research
Webmelody