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