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