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