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