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