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