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