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