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