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