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