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