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