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