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