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