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