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