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)(17,18,23,25,22,20,21,31)(19,26,30,27,29,24,28,32)(1,3,7,15)(2,9,14,16)(4,6,5,8)(10,13,11,12)(17,19)(18,24)(20,26)(21,28)(22,29)(23,30)(25,32)(27,31)(1,4,7,5)(2,10,14,11)(3,6,15,8)(9,13,16,12)(17,20)(18,22)(19,27)(21,31)(23,25)(24,28)(26,30)(29,32)(1,5,7,4)(2,11,14,10)(3,6,15,8)(9,13,16,12)(17,21,22,23)(18,25,20,31)(19,28,29,30)(24,32,26,27)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.