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