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