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