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