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