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