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