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