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