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