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