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