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