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...
A. Dargahi Nobari, N. Reshadatmand, and M. Neshati. Proceedings of the 2017 ACM on Conference on Information and Knowledge Management, page 2035–2038. New York, NY, USA, Association for Computing Machinery, (2017)
T. Sakaki, M. Okazaki, and Y. Matsuo. Proceedings of the 19th International Conference on World Wide Web, page 851--860. New York, NY, USA, ACM, (2010)
C. Pan, and P. Mitra. Proceedings of the 11th annual international ACM/IEEE joint conference on Digital libraries, page 349--358. New York, NY, USA, ACM, (2011)
B. Bullock, H. Lerch, A. Roßnagel, A. Hotho, and G. Stumme. Proceedings of the 11th International Conference on Knowledge Management and Knowledge Technologies, page 15:1--15:8. New York, NY, USA, ACM, (2011)