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