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