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