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