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