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