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