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