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