Visualization of graph data is incredibly challenging, particularly when it comes to extremely large, scale-free graphs and social networks. A few simple searches on the Web and you will find some mesmerizing and very cool images. Perhaps the most cited...
F. Mitzlaff, M. Atzmueller, D. Benz, A. Hotho, and G. Stumme. Analysis of Social Media and Ubiquitous Data, volume 6904 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2011)
C. Giatsidis, D. Thilikos, and M. Vazirgiannis. Advances in Social Networks Analysis and Mining (ASONAM), 2011 International Conference on, page 87-93. (2011)
S. Doerfel, R. Jäschke, and G. Stumme. ICFCA 2012, volume 7278 of Lecture Notes in Artificial Intelligence, page 77--95. Berlin/Heidelberg, Springer, (2012)
B. Yu, and M. Singh. Cooperative Information Agents IV - The Future of Information Agents in Cyberspace, volume 1860 of Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, (2000)
S. Doerfel, R. Jäschke, and G. Stumme. ICFCA 2012, volume 7278 of Lecture Notes in Artificial Intelligence, page 77--95. Berlin/Heidelberg, Springer, (2012)
S. Doerfel, R. Jäschke, and G. Stumme. Formal Concept Analysis, volume 7278 of Lecture Notes in Artificial Intelligence, page 77--95. Berlin/Heidelberg, Springer, (May 2012)