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