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