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