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