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