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