One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,12,13)(11,14,16,15)(17,18,23,28)(19,29,21,25)(20,24,31,26)(22,32,30,27)(2,5)(6,8)(9,11,12,16)(10,14,13,15)(17,19,22,20,23,21,30,31)(18,24,27,29,28,26,32,25)(1,3,4,7)(2,6,5,8)(10,13)(11,15)(14,16)(17,20,30,19,23,31,22,21)(18,25,32,26,28,29,27,24)(2,5)(6,8)(9,10,12,13)(11,14,16,15)(17,21,22,31,23,19,30,20)(18,26,27,25,28,24,32,29)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.