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