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