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)(20,27)(21,24)(22,26)(25,30)(28,31)(29,32) involution — undirected(1,3)(2,5)(4,7)(6,8)(9,10)(11,16)(12,15)(13,14)(17,19)(18,23)(20,28)(21,22)(24,26)(25,30)(27,31)(29,32) involution — undirected(3,7)(5,8)(9,11,13,12)(10,15,14,16)(17,20)(18,25)(19,27)(21,29)(22,30)(23,32)(24,31)(26,28)(2,6)(3,7)(9,11,13,12)(10,16,14,15)(17,21,24,18)(19,22,26,23)(20,29,31,25)(27,30,28,32)(3,7)(5,8)(9,12,13,11)(10,16,14,15)(17,22,24,23)(18,26,21,19)(20,30,31,32)(25,28,29,27)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.