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