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