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)(17,18)(19,23)(20,24)(21,25)(22,26)(27,31)(28,30)(29,32)(2,6)(7,8)(9,11,14,10)(12,15,13,16)(17,19,22,20)(18,24,26,23)(21,25,29,32)(27,31,28,30)(1,3,5,4)(2,7,6,8)(9,12,14,13)(10,15,11,16)(17,20,22,19)(18,24,26,23)(21,28,29,27)(25,30,32,31)(9,13,14,12)(10,16,11,15)(17,21,22,29)(18,25,26,32)(19,27,20,28)(23,31,24,30)(1,4,5,3)(2,7,6,8)(18,26)(19,20)(25,32)(27,28)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.