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