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