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