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