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