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