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