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