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