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