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