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