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