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