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