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