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