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