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