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