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