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