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