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