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