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