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