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