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