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