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