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