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