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