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