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