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