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