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