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