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