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