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