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