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