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