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