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