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