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