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