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