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