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