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