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