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)(17,18,23,25)(19,27,21,24)(20,26,30,31)(22,28,32,29)(2,3)(6,7)(9,10,12,14)(11,13,15,16)(17,19,23,21)(18,24,25,27)(20,29,30,28)(22,26,32,31)(1,2,5,3)(4,6,8,7)(9,11)(10,13)(12,15)(14,16)(18,25)(20,30)(24,27)(28,29)(1,3,5,2)(4,7,8,6)(9,10)(11,13)(12,14)(15,16)(17,20)(18,26)(19,28)(21,29)(22,24)(23,30)(25,31)(27,32)(1,4,5,8)(2,6,3,7)(9,11)(10,13)(12,15)(14,16)(17,21,23,19)(18,27,25,24)(20,29,30,28)(22,26,32,31)(17,22,23,32)(18,28,25,29)(19,26,21,31)(20,27,30,24)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.