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