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