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