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