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