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