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