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