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