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