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