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