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