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)(11,12,16,15)(17,18)(19,20)(21,24)(22,23)(25,26,29,28)(27,30,31,32)(2,4)(6,8)(9,11,14,16)(10,15,13,12)(17,18,21,24)(19,22,23,20)(27,31)(30,32)(17,19)(18,22)(20,24)(21,23)(25,27,29,31)(26,30,28,32)(1,3)(2,6)(4,8)(5,7)(9,12)(10,11)(13,16)(14,15)(17,19)(18,20)(21,23)(22,24) involution — undirected(1,4,5,2)(3,6,7,8)(9,13,14,10)(11,15,16,12)(17,20)(18,23)(19,24)(21,22)(25,28,29,26)(27,32,31,30)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.