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)(8,13)(14,16)(17,18)(19,22)(20,23)(21,24)(25,31)(26,29)(27,30)(28,32) involution — undirected(1,3,7,4)(2,8,11,16)(5,13,6,14)(9,15,12,10)(17,19)(18,22)(20,25)(21,26)(23,28)(24,29)(27,32)(30,31)(1,4,7,3)(2,9,11,12)(5,13,6,14)(8,15,16,10)(17,20)(18,23)(19,25)(21,27)(22,28)(24,30)(26,32)(29,31)(1,5,7,6)(2,10,11,15)(3,13,4,14)(8,9,16,12)(18,24)(22,29)(23,30)(28,31)(2,11)(8,16)(9,12)(10,15) 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.