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