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