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