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