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