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