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