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