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