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