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