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