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