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