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