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