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