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