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