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