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