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