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