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