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