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