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