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)(19,23,21,24)(20,25)(22,26)(27,30,28,31)(29,32)(1,3)(2,7)(4,11)(5,14)(6,12)(8,15)(9,16)(10,13)(18,23)(19,21)(24,26)(25,30)(27,28)(31,32) involution — undirected(1,4,6,5)(2,8,9,13)(3,11,12,14)(7,15,16,10)(17,19,22,21)(18,24,26,23)(20,27,29,28)(25,31,32,30)(17,20,22,29)(18,25,26,32)(19,27,21,28)(23,30,24,31)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.