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