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