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