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