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