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