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