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