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