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