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