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