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