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