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