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