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