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