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