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