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