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