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