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