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