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