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