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