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