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