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