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