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)(20,28)(21,25)(22,27)(24,29)(26,30)(31,32) involution — undirected(1,2)(3,7)(4,8)(5,6)(9,10,13,12)(11,14,15,16)(17,18,21,25)(19,23,27,22)(20,24,29,28)(26,31,32,30)(9,11)(10,14)(12,16)(13,15)(17,19,21,27)(18,22,25,23)(20,26,29,32)(24,30,28,31)(1,3,5,4)(2,7,6,8)(9,12,13,10)(11,14,15,16)(17,19)(18,23)(20,26)(21,27)(22,25)(24,31)(28,30)(29,32)(1,3,5,4)(2,7,6,8)(17,18)(19,23)(20,24)(21,25)(22,27)(26,31)(28,29)(30,32)(1,4,5,3)(2,8,6,7)(17,20,21,29)(18,24,25,28)(19,26,27,32)(22,30,23,31)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.