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