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