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