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