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