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