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