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