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)(17,18,22,25,21,26,20,24)(19,27,30,32,29,23,28,31)(5,6,7,8)(10,13)(14,16)(17,19,22,30,21,29,20,28)(18,23,25,31,26,27,24,32)(2,4)(6,8)(9,11)(10,14)(12,15)(13,16)(18,24)(19,28)(20,22)(23,27)(25,26)(29,30) involution — undirected(11,15)(14,16)(17,20,21,22)(18,25,26,24)(19,28,29,30)(23,31,27,32)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.