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