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