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