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