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