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