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