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