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