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