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