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