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