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