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