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