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