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