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