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