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