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