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