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