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