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