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)(17,18,21,22)(19,24,23,20)(25,26)(27,29)(28,30)(31,32)(2,3)(6,7)(9,11,14,13)(10,15,16,12)(17,18)(19,24)(20,23)(21,22)(2,3)(6,7)(10,16)(12,15)(18,22)(19,23)(25,26,28,30)(27,29,31,32)(1,3,5,2)(4,7,8,6)(9,12,14,15)(10,11,16,13)(17,19,21,23)(18,20,22,24)(25,26)(27,29)(28,30)(31,32)(1,4,5,8)(2,6,3,7)(9,13,14,11)(10,15,16,12)(17,20)(18,23)(19,22)(21,24)(25,27,28,31)(26,29,30,32)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.