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)(11,15)(12,14)(13,16)(17,18,22,23)(19,24,28,31)(20,21,30,25)(26,27,32,29)(9,11)(10,13)(12,16)(14,15)(17,19,22,28)(18,24,23,31)(20,29,30,27)(21,26,25,32)(2,6)(7,8)(10,14)(11,16)(17,20,23,21,22,30,18,25)(19,26,24,29,28,32,31,27)(1,3,5,4)(2,7,6,8)(10,14)(13,15)(20,30)(21,25)(26,32)(27,29)(1,4,5,3)(2,8,6,7)(17,21,23,30,22,25,18,20)(19,27,24,26,28,29,31,32)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.