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