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