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