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