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