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