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