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