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)(26,31)(27,30)(28,32) involution — undirected(1,3,5,4)(2,6,7,8)(9,10,15,16,13,11,12,14)(17,19,20,26,21,27,28,25)(18,22,24,31,23,30,32,29)(1,4,5,3)(2,6,7,8)(9,11,12,16,13,10,15,14)(19,25)(20,28)(22,29)(24,32)(26,27)(30,31)(2,7)(6,8)(9,10,12,14,13,11,15,16)(18,23)(22,30)(24,32)(29,31)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.