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