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