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