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