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