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