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