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