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