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