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