One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10)(11,13)(12,14)(15,16)(17,18,22,25)(19,21,27,23)(20,24,31,28)(26,30,29,32)(2,5)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19)(18,23)(20,28)(21,25)(22,27)(24,31)(26,32)(29,30) involution — undirected(10,14)(11,15)(17,19)(18,21)(20,29)(22,27)(23,25)(24,32)(26,31)(28,30) involution — undirected(10,14)(13,16)(17,20,23,32,22,31,21,30)(18,24,19,26,25,28,27,29)(1,3,4,8)(2,6,5,7)(17,21,22,23)(18,19,25,27)(20,30,31,32)(24,26,28,29)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.