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