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)(19,27,30,24)(20,23,25,21)(28,32,31,29)(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19)(18,24)(20,31)(21,29)(22,30)(23,32)(25,28)(26,27) involution — undirected(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,18,23,20,22,26,21,25)(19,28,29,27,30,31,32,24)(1,4,5,3)(2,8,6,7)(10,14)(13,15)(17,20,23,26,22,25,21,18)(19,27,29,31,30,24,32,28)(2,6)(7,8)(10,14)(13,15)(17,21,22,23)(18,25,26,20)(19,29,30,32)(24,28,27,31)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.