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