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