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