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