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