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