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