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