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