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