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