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