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