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