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)(11,16)(12,15)(13,14)(18,21)(22,24)(25,26,28,30)(27,31,32,29)(1,3)(2,6)(4,7)(5,8)(9,11)(10,12)(13,16)(14,15)(19,23)(22,24)(25,26,28,30)(27,29,32,31)(2,4)(6,7)(10,13)(11,15)(17,18)(19,22)(20,21)(23,24)(25,27)(26,29)(28,32)(30,31) involution — undirected(1,3)(2,6)(4,7)(5,8)(9,12,14,16)(10,15,13,11)(17,19)(18,22)(20,23)(21,24)(25,26)(27,29)(28,30)(31,32)(1,4,5,2)(3,7,8,6)(9,13,14,10)(11,16,15,12)(17,18)(19,22)(20,21)(23,24)(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.