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