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