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