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