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