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