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