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