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