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