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