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