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