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