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