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