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)(11,14)(12,13)(15,16)(17,18,22,25)(19,24,29,32)(20,21,26,23)(27,28,30,31)(2,5)(3,7)(17,19)(18,24)(20,28)(21,30)(22,29)(23,27)(25,32)(26,31) involution — undirected(10,13)(14,16)(18,25)(19,27)(21,23)(24,31)(28,32)(29,30) involution — undirected(2,5)(6,8)(9,11,12,15)(10,14,13,16)(17,20)(18,21)(19,28)(22,26)(23,25)(24,30)(27,32)(29,31)(1,3,4,7)(2,6,5,8)(17,21)(18,26)(20,25)(22,23)(27,30)(28,31)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.