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