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