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