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