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