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