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