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