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