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