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