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)(17,18,21,23)(19,27,29,24)(20,28,30,25)(22,26,31,32)(1,3,5,4)(2,6,7,8)(9,11,12,15)(10,13,14,16)(18,23)(19,28)(20,27)(22,31)(24,30)(25,29)(10,14)(13,16)(17,19,21,29)(18,24,23,27)(20,26,30,32)(22,25,31,28)(1,4,5,3)(2,6,7,8)(19,25)(20,27)(22,31)(24,30)(26,32)(28,29)(17,20,21,30)(18,25,23,28)(19,26,29,32)(22,24,31,27)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.