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