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