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