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