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