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