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