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