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