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