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