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