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