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