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