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