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