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