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