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