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