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