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