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