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