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