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