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