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