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