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