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