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