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