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