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