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