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