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