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