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