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