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