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