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