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