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