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