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