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)(14,19)(16,20)(21,22,24,26)(23,27,28,25)(6,9)(11,12)(13,14,18,19)(15,20,17,16)(23,28)(25,27)(5,7,10,8)(6,11,9,12)(13,15,18,17)(14,20,19,16)(21,23)(22,25)(24,28)(26,27)(1,2)(3,4)(5,8,10,7)(6,11,9,12)(13,16)(14,15)(17,19)(18,20)(21,22)(23,25)(24,26)(27,28)(5,9,10,6)(7,12,8,11)(13,17,18,15)(14,20,19,16)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.