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