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