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