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