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