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