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