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