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