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