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