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