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