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