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