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)(11,13)(12,14)(15,16)(17,18)(19,23)(20,24)(21,22)(25,26,30,29)(27,31,28,32)(1,3)(2,4)(5,8)(6,7)(11,15)(13,16)(18,21)(23,24)(25,26)(27,32)(28,31)(29,30) involution — undirected(2,6)(3,8)(9,10,12,14)(11,13,15,16)(17,19,22,20)(18,23,21,24)(25,27,30,28)(26,31,29,32)(1,3)(2,7)(4,6)(5,8)(9,10)(11,13)(12,14)(15,16)(17,20,22,19)(18,23,21,24)(25,28,30,27)(26,31,29,32)(1,4,5,7)(2,3,6,8)(9,11,12,15)(10,13,14,16)(17,21,22,18)(19,23,20,24)(25,29,30,26)(27,31,28,32)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.