One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,8)(3,11,4,14)(5,16,12,10)(7,15,9,13)(17,18,24,19)(20,31,32,21)(22,28,23,27)(25,30,29,26)(1,3,5,13,6,4,12,15)(2,7,10,11,8,9,16,14)(17,19,22,28,24,18,23,27)(20,21,30,29,32,31,26,25)(2,8)(7,9)(10,16)(11,14)(17,20,22,30,24,32,23,26)(18,25,27,21,19,29,28,31)(1,4,5,15,6,3,12,13)(2,9,10,14,8,7,16,11)(17,21,23,25,24,31,22,29)(18,26,28,32,19,30,27,20)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.