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