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