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