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