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