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