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)(11,13)(12,15)(14,16)(17,18,23,24,22,27,19,28)(20,21,30,32,31,25,26,29)(3,8)(5,7)(9,11,13,10)(12,15,16,14)(17,19,22,23)(18,24,27,28)(20,30,31,26)(21,29,25,32)(1,3,4,8)(2,5,6,7)(10,11)(14,15)(17,20)(18,25)(19,26)(21,27)(22,31)(23,30)(24,29)(28,32)(2,6)(5,7)(10,11)(14,15)(17,21,23,32,22,25,19,29)(18,26,24,20,27,30,28,31)(9,12,13,16)(10,14,11,15)(17,19,22,23)(18,24,27,28)(20,30,31,26)(21,29,25,32)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.