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