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