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