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