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