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