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