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