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