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