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