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