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