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