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