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