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