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