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