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