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