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