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