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