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