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