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