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