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