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