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