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