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