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)(11,15)(12,13)(14,16)(17,18,22,21)(19,23,20,24)(25,26)(27,28)(29,32)(30,31)(1,3,5,8)(2,6,7,4)(9,11,14,12)(10,13,16,15)(17,18)(19,24)(20,23)(21,22)(26,31)(27,29)(9,11,14,12)(10,15,16,13)(17,19,22,20)(18,23,21,24)(25,27,30,29)(26,32,31,28)(1,2)(3,6)(4,8)(5,7)(9,12,14,11)(10,15,16,13)(17,20,22,19)(18,23,21,24)(25,28)(26,27)(29,31)(30,32)(1,4,5,6)(2,3,7,8)(9,13,14,15)(10,12,16,11)(17,21,22,18)(19,24,20,23)(25,29,30,27)(26,32,31,28)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.