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