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