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