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