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