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