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