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