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