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