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