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