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