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