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