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