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