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