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