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