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