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