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