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