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