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