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