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