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