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