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