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