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