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