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