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