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