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