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