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