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