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