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