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