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