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