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