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