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