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