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