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