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