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