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