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