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)(15,19)(16,20)(17,18)(21,22,25,28)(23,24,27,26)(5,7)(6,9)(8,12)(10,11)(13,14,17,18)(15,19,20,16)(21,22,25,28)(23,24,27,26)(7,11)(9,12)(14,18)(16,19)(21,23,25,27)(22,26,28,24)(1,2)(3,4)(5,8,10,6)(7,12,11,9)(13,15)(14,16)(17,20)(18,19)(21,22)(23,26)(24,27)(25,28)(5,9,10,12)(6,11,8,7)(13,16)(14,15)(17,19)(18,20)(21,24,25,26)(22,27,28,23)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.