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