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