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