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