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