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