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