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