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