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