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