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