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