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