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