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