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