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