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