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