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