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