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