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