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