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