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