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