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