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