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