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