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