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