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