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