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