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